The time it takes for information in an electrical circuit to be passed from one point to another depends on the speed of the pulse in the circuit and the distance between the two places. The smaller the circuit the shorter the time and the faster the circuit can operate.
If two people signal to each other with flags the time it takes the light to travel between the two places will affect the time it takes one of them to see the other's flag move. If they are closer together the time between the movement of one flag and when it is seen to move by the other person will be less.